1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kmod.h> 3 #include <linux/netdevice.h> 4 #include <linux/inetdevice.h> 5 #include <linux/etherdevice.h> 6 #include <linux/rtnetlink.h> 7 #include <linux/net_tstamp.h> 8 #include <linux/phylib_stubs.h> 9 #include <linux/wireless.h> 10 #include <linux/if_bridge.h> 11 #include <net/dsa_stubs.h> 12 #include <net/wext.h> 13 14 #include "dev.h" 15 16 /* 17 * Map an interface index to its name (SIOCGIFNAME) 18 */ 19 20 /* 21 * We need this ioctl for efficient implementation of the 22 * if_indextoname() function required by the IPv6 API. Without 23 * it, we would have to search all the interfaces to find a 24 * match. --pb 25 */ 26 27 static int dev_ifname(struct net *net, struct ifreq *ifr) 28 { 29 ifr->ifr_name[IFNAMSIZ-1] = 0; 30 return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex); 31 } 32 33 /* 34 * Perform a SIOCGIFCONF call. This structure will change 35 * size eventually, and there is nothing I can do about it. 36 * Thus we will need a 'compatibility mode'. 37 */ 38 int dev_ifconf(struct net *net, struct ifconf __user *uifc) 39 { 40 struct net_device *dev; 41 void __user *pos; 42 size_t size; 43 int len, total = 0, done; 44 45 /* both the ifconf and the ifreq structures are slightly different */ 46 if (in_compat_syscall()) { 47 struct compat_ifconf ifc32; 48 49 if (copy_from_user(&ifc32, uifc, sizeof(struct compat_ifconf))) 50 return -EFAULT; 51 52 pos = compat_ptr(ifc32.ifcbuf); 53 len = ifc32.ifc_len; 54 size = sizeof(struct compat_ifreq); 55 } else { 56 struct ifconf ifc; 57 58 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) 59 return -EFAULT; 60 61 pos = ifc.ifc_buf; 62 len = ifc.ifc_len; 63 size = sizeof(struct ifreq); 64 } 65 66 /* Loop over the interfaces, and write an info block for each. */ 67 rtnl_lock(); 68 for_each_netdev(net, dev) { 69 if (!pos) 70 done = inet_gifconf(dev, NULL, 0, size); 71 else 72 done = inet_gifconf(dev, pos + total, 73 len - total, size); 74 if (done < 0) { 75 rtnl_unlock(); 76 return -EFAULT; 77 } 78 total += done; 79 } 80 rtnl_unlock(); 81 82 return put_user(total, &uifc->ifc_len); 83 } 84 85 static int dev_getifmap(struct net_device *dev, struct ifreq *ifr) 86 { 87 struct ifmap *ifmap = &ifr->ifr_map; 88 89 if (in_compat_syscall()) { 90 struct compat_ifmap *cifmap = (struct compat_ifmap *)ifmap; 91 92 cifmap->mem_start = dev->mem_start; 93 cifmap->mem_end = dev->mem_end; 94 cifmap->base_addr = dev->base_addr; 95 cifmap->irq = dev->irq; 96 cifmap->dma = dev->dma; 97 cifmap->port = dev->if_port; 98 99 return 0; 100 } 101 102 ifmap->mem_start = dev->mem_start; 103 ifmap->mem_end = dev->mem_end; 104 ifmap->base_addr = dev->base_addr; 105 ifmap->irq = dev->irq; 106 ifmap->dma = dev->dma; 107 ifmap->port = dev->if_port; 108 109 return 0; 110 } 111 112 static int dev_setifmap(struct net_device *dev, struct ifreq *ifr) 113 { 114 struct compat_ifmap *cifmap = (struct compat_ifmap *)&ifr->ifr_map; 115 116 if (!dev->netdev_ops->ndo_set_config) 117 return -EOPNOTSUPP; 118 119 if (in_compat_syscall()) { 120 struct ifmap ifmap = { 121 .mem_start = cifmap->mem_start, 122 .mem_end = cifmap->mem_end, 123 .base_addr = cifmap->base_addr, 124 .irq = cifmap->irq, 125 .dma = cifmap->dma, 126 .port = cifmap->port, 127 }; 128 129 return dev->netdev_ops->ndo_set_config(dev, &ifmap); 130 } 131 132 return dev->netdev_ops->ndo_set_config(dev, &ifr->ifr_map); 133 } 134 135 /* 136 * Perform the SIOCxIFxxx calls, inside rcu_read_lock() 137 */ 138 static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) 139 { 140 int err; 141 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); 142 143 if (!dev) 144 return -ENODEV; 145 146 switch (cmd) { 147 case SIOCGIFFLAGS: /* Get interface flags */ 148 ifr->ifr_flags = (short) dev_get_flags(dev); 149 return 0; 150 151 case SIOCGIFMETRIC: /* Get the metric on the interface 152 (currently unused) */ 153 ifr->ifr_metric = 0; 154 return 0; 155 156 case SIOCGIFMTU: /* Get the MTU of a device */ 157 ifr->ifr_mtu = dev->mtu; 158 return 0; 159 160 case SIOCGIFSLAVE: 161 err = -EINVAL; 162 break; 163 164 case SIOCGIFMAP: 165 return dev_getifmap(dev, ifr); 166 167 case SIOCGIFINDEX: 168 ifr->ifr_ifindex = dev->ifindex; 169 return 0; 170 171 case SIOCGIFTXQLEN: 172 ifr->ifr_qlen = dev->tx_queue_len; 173 return 0; 174 175 default: 176 /* dev_ioctl() should ensure this case 177 * is never reached 178 */ 179 WARN_ON(1); 180 err = -ENOTTY; 181 break; 182 183 } 184 return err; 185 } 186 187 static int net_hwtstamp_validate(const struct kernel_hwtstamp_config *cfg) 188 { 189 enum hwtstamp_tx_types tx_type; 190 enum hwtstamp_rx_filters rx_filter; 191 int tx_type_valid = 0; 192 int rx_filter_valid = 0; 193 194 if (cfg->flags & ~HWTSTAMP_FLAG_MASK) 195 return -EINVAL; 196 197 tx_type = cfg->tx_type; 198 rx_filter = cfg->rx_filter; 199 200 switch (tx_type) { 201 case HWTSTAMP_TX_OFF: 202 case HWTSTAMP_TX_ON: 203 case HWTSTAMP_TX_ONESTEP_SYNC: 204 case HWTSTAMP_TX_ONESTEP_P2P: 205 tx_type_valid = 1; 206 break; 207 case __HWTSTAMP_TX_CNT: 208 /* not a real value */ 209 break; 210 } 211 212 switch (rx_filter) { 213 case HWTSTAMP_FILTER_NONE: 214 case HWTSTAMP_FILTER_ALL: 215 case HWTSTAMP_FILTER_SOME: 216 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 217 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 218 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 219 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 220 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 221 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 222 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 223 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 224 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 225 case HWTSTAMP_FILTER_PTP_V2_EVENT: 226 case HWTSTAMP_FILTER_PTP_V2_SYNC: 227 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 228 case HWTSTAMP_FILTER_NTP_ALL: 229 rx_filter_valid = 1; 230 break; 231 case __HWTSTAMP_FILTER_CNT: 232 /* not a real value */ 233 break; 234 } 235 236 if (!tx_type_valid || !rx_filter_valid) 237 return -ERANGE; 238 239 return 0; 240 } 241 242 static int dev_eth_ioctl(struct net_device *dev, 243 struct ifreq *ifr, unsigned int cmd) 244 { 245 const struct net_device_ops *ops = dev->netdev_ops; 246 247 if (!ops->ndo_eth_ioctl) 248 return -EOPNOTSUPP; 249 250 if (!netif_device_present(dev)) 251 return -ENODEV; 252 253 return ops->ndo_eth_ioctl(dev, ifr, cmd); 254 } 255 256 /** 257 * dev_get_hwtstamp_phylib() - Get hardware timestamping settings of NIC 258 * or of attached phylib PHY 259 * @dev: Network device 260 * @cfg: Timestamping configuration structure 261 * 262 * Helper for enforcing a common policy that phylib timestamping, if available, 263 * should take precedence in front of hardware timestamping provided by the 264 * netdev. 265 * 266 * Note: phy_mii_ioctl() only handles SIOCSHWTSTAMP (not SIOCGHWTSTAMP), and 267 * there only exists a phydev->mii_ts->hwtstamp() method. So this will return 268 * -EOPNOTSUPP for phylib for now, which is still more accurate than letting 269 * the netdev handle the GET request. 270 */ 271 static int dev_get_hwtstamp_phylib(struct net_device *dev, 272 struct kernel_hwtstamp_config *cfg) 273 { 274 if (phy_has_hwtstamp(dev->phydev)) 275 return phy_hwtstamp_get(dev->phydev, cfg); 276 277 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 278 } 279 280 static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) 281 { 282 const struct net_device_ops *ops = dev->netdev_ops; 283 struct kernel_hwtstamp_config kernel_cfg = {}; 284 struct hwtstamp_config cfg; 285 int err; 286 287 if (!ops->ndo_hwtstamp_get) 288 return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP); /* legacy */ 289 290 if (!netif_device_present(dev)) 291 return -ENODEV; 292 293 kernel_cfg.ifr = ifr; 294 err = dev_get_hwtstamp_phylib(dev, &kernel_cfg); 295 if (err) 296 return err; 297 298 /* If the request was resolved through an unconverted driver, omit 299 * the copy_to_user(), since the implementation has already done that 300 */ 301 if (!kernel_cfg.copied_to_user) { 302 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 303 304 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 305 return -EFAULT; 306 } 307 308 return 0; 309 } 310 311 /** 312 * dev_set_hwtstamp_phylib() - Change hardware timestamping of NIC 313 * or of attached phylib PHY 314 * @dev: Network device 315 * @cfg: Timestamping configuration structure 316 * @extack: Netlink extended ack message structure, for error reporting 317 * 318 * Helper for enforcing a common policy that phylib timestamping, if available, 319 * should take precedence in front of hardware timestamping provided by the 320 * netdev. If the netdev driver needs to perform specific actions even for PHY 321 * timestamping to work properly (a switch port must trap the timestamped 322 * frames and not forward them), it must set IFF_SEE_ALL_HWTSTAMP_REQUESTS in 323 * dev->priv_flags. 324 */ 325 int dev_set_hwtstamp_phylib(struct net_device *dev, 326 struct kernel_hwtstamp_config *cfg, 327 struct netlink_ext_ack *extack) 328 { 329 const struct net_device_ops *ops = dev->netdev_ops; 330 bool phy_ts = phy_has_hwtstamp(dev->phydev); 331 struct kernel_hwtstamp_config old_cfg = {}; 332 bool changed = false; 333 int err; 334 335 cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; 336 337 if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { 338 err = ops->ndo_hwtstamp_get(dev, &old_cfg); 339 if (err) 340 return err; 341 } 342 343 if (!phy_ts || (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { 344 err = ops->ndo_hwtstamp_set(dev, cfg, extack); 345 if (err) { 346 if (extack->_msg) 347 netdev_err(dev, "%s\n", extack->_msg); 348 return err; 349 } 350 } 351 352 if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) 353 changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); 354 355 if (phy_ts) { 356 err = phy_hwtstamp_set(dev->phydev, cfg, extack); 357 if (err) { 358 if (changed) 359 ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); 360 return err; 361 } 362 } 363 364 return 0; 365 } 366 EXPORT_SYMBOL_GPL(dev_set_hwtstamp_phylib); 367 368 static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) 369 { 370 const struct net_device_ops *ops = dev->netdev_ops; 371 struct kernel_hwtstamp_config kernel_cfg = {}; 372 struct netlink_ext_ack extack = {}; 373 struct hwtstamp_config cfg; 374 int err; 375 376 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 377 return -EFAULT; 378 379 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 380 kernel_cfg.ifr = ifr; 381 382 err = net_hwtstamp_validate(&kernel_cfg); 383 if (err) 384 return err; 385 386 err = dsa_conduit_hwtstamp_validate(dev, &kernel_cfg, &extack); 387 if (err) { 388 if (extack._msg) 389 netdev_err(dev, "%s\n", extack._msg); 390 return err; 391 } 392 393 if (!ops->ndo_hwtstamp_set) 394 return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP); /* legacy */ 395 396 if (!netif_device_present(dev)) 397 return -ENODEV; 398 399 err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); 400 if (err) 401 return err; 402 403 /* The driver may have modified the configuration, so copy the 404 * updated version of it back to user space 405 */ 406 if (!kernel_cfg.copied_to_user) { 407 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 408 409 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 410 return -EFAULT; 411 } 412 413 return 0; 414 } 415 416 static int generic_hwtstamp_ioctl_lower(struct net_device *dev, int cmd, 417 struct kernel_hwtstamp_config *kernel_cfg) 418 { 419 struct ifreq ifrr; 420 int err; 421 422 strscpy_pad(ifrr.ifr_name, dev->name, IFNAMSIZ); 423 ifrr.ifr_ifru = kernel_cfg->ifr->ifr_ifru; 424 425 err = dev_eth_ioctl(dev, &ifrr, cmd); 426 if (err) 427 return err; 428 429 kernel_cfg->ifr->ifr_ifru = ifrr.ifr_ifru; 430 kernel_cfg->copied_to_user = true; 431 432 return 0; 433 } 434 435 int generic_hwtstamp_get_lower(struct net_device *dev, 436 struct kernel_hwtstamp_config *kernel_cfg) 437 { 438 const struct net_device_ops *ops = dev->netdev_ops; 439 440 if (!netif_device_present(dev)) 441 return -ENODEV; 442 443 if (ops->ndo_hwtstamp_get) 444 return dev_get_hwtstamp_phylib(dev, kernel_cfg); 445 446 /* Legacy path: unconverted lower driver */ 447 return generic_hwtstamp_ioctl_lower(dev, SIOCGHWTSTAMP, kernel_cfg); 448 } 449 EXPORT_SYMBOL(generic_hwtstamp_get_lower); 450 451 int generic_hwtstamp_set_lower(struct net_device *dev, 452 struct kernel_hwtstamp_config *kernel_cfg, 453 struct netlink_ext_ack *extack) 454 { 455 const struct net_device_ops *ops = dev->netdev_ops; 456 457 if (!netif_device_present(dev)) 458 return -ENODEV; 459 460 if (ops->ndo_hwtstamp_set) 461 return dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); 462 463 /* Legacy path: unconverted lower driver */ 464 return generic_hwtstamp_ioctl_lower(dev, SIOCSHWTSTAMP, kernel_cfg); 465 } 466 EXPORT_SYMBOL(generic_hwtstamp_set_lower); 467 468 static int dev_siocbond(struct net_device *dev, 469 struct ifreq *ifr, unsigned int cmd) 470 { 471 const struct net_device_ops *ops = dev->netdev_ops; 472 473 if (ops->ndo_siocbond) { 474 if (netif_device_present(dev)) 475 return ops->ndo_siocbond(dev, ifr, cmd); 476 else 477 return -ENODEV; 478 } 479 480 return -EOPNOTSUPP; 481 } 482 483 static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 484 void __user *data, unsigned int cmd) 485 { 486 const struct net_device_ops *ops = dev->netdev_ops; 487 488 if (ops->ndo_siocdevprivate) { 489 if (netif_device_present(dev)) 490 return ops->ndo_siocdevprivate(dev, ifr, data, cmd); 491 else 492 return -ENODEV; 493 } 494 495 return -EOPNOTSUPP; 496 } 497 498 static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) 499 { 500 const struct net_device_ops *ops = dev->netdev_ops; 501 502 if (ops->ndo_siocwandev) { 503 if (netif_device_present(dev)) 504 return ops->ndo_siocwandev(dev, ifs); 505 else 506 return -ENODEV; 507 } 508 509 return -EOPNOTSUPP; 510 } 511 512 /* 513 * Perform the SIOCxIFxxx calls, inside rtnl_lock() 514 */ 515 static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, 516 unsigned int cmd) 517 { 518 int err; 519 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 520 const struct net_device_ops *ops; 521 netdevice_tracker dev_tracker; 522 523 if (!dev) 524 return -ENODEV; 525 526 ops = dev->netdev_ops; 527 528 switch (cmd) { 529 case SIOCSIFFLAGS: /* Set interface flags */ 530 return dev_change_flags(dev, ifr->ifr_flags, NULL); 531 532 case SIOCSIFMETRIC: /* Set the metric on the interface 533 (currently unused) */ 534 return -EOPNOTSUPP; 535 536 case SIOCSIFMTU: /* Set the MTU of a device */ 537 return dev_set_mtu(dev, ifr->ifr_mtu); 538 539 case SIOCSIFHWADDR: 540 if (dev->addr_len > sizeof(struct sockaddr)) 541 return -EINVAL; 542 return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL); 543 544 case SIOCSIFHWBROADCAST: 545 if (ifr->ifr_hwaddr.sa_family != dev->type) 546 return -EINVAL; 547 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, 548 min(sizeof(ifr->ifr_hwaddr.sa_data_min), 549 (size_t)dev->addr_len)); 550 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 551 return 0; 552 553 case SIOCSIFMAP: 554 return dev_setifmap(dev, ifr); 555 556 case SIOCADDMULTI: 557 if (!ops->ndo_set_rx_mode || 558 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 559 return -EINVAL; 560 if (!netif_device_present(dev)) 561 return -ENODEV; 562 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); 563 564 case SIOCDELMULTI: 565 if (!ops->ndo_set_rx_mode || 566 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 567 return -EINVAL; 568 if (!netif_device_present(dev)) 569 return -ENODEV; 570 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); 571 572 case SIOCSIFTXQLEN: 573 if (ifr->ifr_qlen < 0) 574 return -EINVAL; 575 return dev_change_tx_queue_len(dev, ifr->ifr_qlen); 576 577 case SIOCSIFNAME: 578 ifr->ifr_newname[IFNAMSIZ-1] = '\0'; 579 return dev_change_name(dev, ifr->ifr_newname); 580 581 case SIOCWANDEV: 582 return dev_siocwandev(dev, &ifr->ifr_settings); 583 584 case SIOCBRADDIF: 585 case SIOCBRDELIF: 586 if (!netif_device_present(dev)) 587 return -ENODEV; 588 if (!netif_is_bridge_master(dev)) 589 return -EOPNOTSUPP; 590 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 591 rtnl_unlock(); 592 err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); 593 netdev_put(dev, &dev_tracker); 594 rtnl_lock(); 595 return err; 596 597 case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: 598 return dev_siocdevprivate(dev, ifr, data, cmd); 599 600 case SIOCSHWTSTAMP: 601 return dev_set_hwtstamp(dev, ifr); 602 603 case SIOCGHWTSTAMP: 604 return dev_get_hwtstamp(dev, ifr); 605 606 case SIOCGMIIPHY: 607 case SIOCGMIIREG: 608 case SIOCSMIIREG: 609 return dev_eth_ioctl(dev, ifr, cmd); 610 611 case SIOCBONDENSLAVE: 612 case SIOCBONDRELEASE: 613 case SIOCBONDSETHWADDR: 614 case SIOCBONDSLAVEINFOQUERY: 615 case SIOCBONDINFOQUERY: 616 case SIOCBONDCHANGEACTIVE: 617 return dev_siocbond(dev, ifr, cmd); 618 619 /* Unknown ioctl */ 620 default: 621 err = -EINVAL; 622 } 623 return err; 624 } 625 626 /** 627 * dev_load - load a network module 628 * @net: the applicable net namespace 629 * @name: name of interface 630 * 631 * If a network interface is not present and the process has suitable 632 * privileges this function loads the module. If module loading is not 633 * available in this kernel then it becomes a nop. 634 */ 635 636 void dev_load(struct net *net, const char *name) 637 { 638 struct net_device *dev; 639 int no_module; 640 641 rcu_read_lock(); 642 dev = dev_get_by_name_rcu(net, name); 643 rcu_read_unlock(); 644 645 no_module = !dev; 646 if (no_module && capable(CAP_NET_ADMIN)) 647 no_module = request_module("netdev-%s", name); 648 if (no_module && capable(CAP_SYS_MODULE)) 649 request_module("%s", name); 650 } 651 EXPORT_SYMBOL(dev_load); 652 653 /* 654 * This function handles all "interface"-type I/O control requests. The actual 655 * 'doing' part of this is dev_ifsioc above. 656 */ 657 658 /** 659 * dev_ioctl - network device ioctl 660 * @net: the applicable net namespace 661 * @cmd: command to issue 662 * @ifr: pointer to a struct ifreq in user space 663 * @data: data exchanged with userspace 664 * @need_copyout: whether or not copy_to_user() should be called 665 * 666 * Issue ioctl functions to devices. This is normally called by the 667 * user space syscall interfaces but can sometimes be useful for 668 * other purposes. The return value is the return from the syscall if 669 * positive or a negative errno code on error. 670 */ 671 672 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, 673 void __user *data, bool *need_copyout) 674 { 675 int ret; 676 char *colon; 677 678 if (need_copyout) 679 *need_copyout = true; 680 if (cmd == SIOCGIFNAME) 681 return dev_ifname(net, ifr); 682 683 ifr->ifr_name[IFNAMSIZ-1] = 0; 684 685 colon = strchr(ifr->ifr_name, ':'); 686 if (colon) 687 *colon = 0; 688 689 /* 690 * See which interface the caller is talking about. 691 */ 692 693 switch (cmd) { 694 case SIOCGIFHWADDR: 695 dev_load(net, ifr->ifr_name); 696 ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name); 697 if (colon) 698 *colon = ':'; 699 return ret; 700 /* 701 * These ioctl calls: 702 * - can be done by all. 703 * - atomic and do not require locking. 704 * - return a value 705 */ 706 case SIOCGIFFLAGS: 707 case SIOCGIFMETRIC: 708 case SIOCGIFMTU: 709 case SIOCGIFSLAVE: 710 case SIOCGIFMAP: 711 case SIOCGIFINDEX: 712 case SIOCGIFTXQLEN: 713 dev_load(net, ifr->ifr_name); 714 rcu_read_lock(); 715 ret = dev_ifsioc_locked(net, ifr, cmd); 716 rcu_read_unlock(); 717 if (colon) 718 *colon = ':'; 719 return ret; 720 721 case SIOCETHTOOL: 722 dev_load(net, ifr->ifr_name); 723 ret = dev_ethtool(net, ifr, data); 724 if (colon) 725 *colon = ':'; 726 return ret; 727 728 /* 729 * These ioctl calls: 730 * - require superuser power. 731 * - require strict serialization. 732 * - return a value 733 */ 734 case SIOCGMIIPHY: 735 case SIOCGMIIREG: 736 case SIOCSIFNAME: 737 dev_load(net, ifr->ifr_name); 738 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 739 return -EPERM; 740 rtnl_lock(); 741 ret = dev_ifsioc(net, ifr, data, cmd); 742 rtnl_unlock(); 743 if (colon) 744 *colon = ':'; 745 return ret; 746 747 /* 748 * These ioctl calls: 749 * - require superuser power. 750 * - require strict serialization. 751 * - do not return a value 752 */ 753 case SIOCSIFMAP: 754 case SIOCSIFTXQLEN: 755 if (!capable(CAP_NET_ADMIN)) 756 return -EPERM; 757 fallthrough; 758 /* 759 * These ioctl calls: 760 * - require local superuser power. 761 * - require strict serialization. 762 * - do not return a value 763 */ 764 case SIOCSIFFLAGS: 765 case SIOCSIFMETRIC: 766 case SIOCSIFMTU: 767 case SIOCSIFHWADDR: 768 case SIOCSIFSLAVE: 769 case SIOCADDMULTI: 770 case SIOCDELMULTI: 771 case SIOCSIFHWBROADCAST: 772 case SIOCSMIIREG: 773 case SIOCBONDENSLAVE: 774 case SIOCBONDRELEASE: 775 case SIOCBONDSETHWADDR: 776 case SIOCBONDCHANGEACTIVE: 777 case SIOCBRADDIF: 778 case SIOCBRDELIF: 779 case SIOCSHWTSTAMP: 780 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 781 return -EPERM; 782 fallthrough; 783 case SIOCBONDSLAVEINFOQUERY: 784 case SIOCBONDINFOQUERY: 785 dev_load(net, ifr->ifr_name); 786 rtnl_lock(); 787 ret = dev_ifsioc(net, ifr, data, cmd); 788 rtnl_unlock(); 789 if (need_copyout) 790 *need_copyout = false; 791 return ret; 792 793 case SIOCGIFMEM: 794 /* Get the per device memory space. We can add this but 795 * currently do not support it */ 796 case SIOCSIFMEM: 797 /* Set the per device memory buffer space. 798 * Not applicable in our case */ 799 case SIOCSIFLINK: 800 return -ENOTTY; 801 802 /* 803 * Unknown or private ioctl. 804 */ 805 default: 806 if (cmd == SIOCWANDEV || 807 cmd == SIOCGHWTSTAMP || 808 (cmd >= SIOCDEVPRIVATE && 809 cmd <= SIOCDEVPRIVATE + 15)) { 810 dev_load(net, ifr->ifr_name); 811 rtnl_lock(); 812 ret = dev_ifsioc(net, ifr, data, cmd); 813 rtnl_unlock(); 814 return ret; 815 } 816 return -ENOTTY; 817 } 818 } 819